Woven-wire belt for paper-making machines



Sept 1, 1931. N. w. WEBB 1,821,453

WOVEN WIRE BELT FOR PAPER MAKING MACHINES Filed Sept. 10, 1929 IN VEN TOR.

NQLEIUNNNEBB. 7 i v lum- A TTORNEY.

Patented Sept. 1, 1931 ONITED STATES PATENT OFFICE NELSON W. WEBB, OF BELLEVILLE, NEW JERSEY, ASSIGNOR T0 EAE'IWOOD WIRE CORPORATION, OF BELLEVILLE, NEW JERSEY, A GORIPORATION OF NEW JERSEY WOVEN-WIRE BELT FOR PAPER-MAKING MACHINES Application filed September 10, 1929. Serial No. 391,618.

The present invention relates to woven wire belts, particularly for paper making machines of the Fourdrinier type, and has for an object to provide an improved seam structure in which the lacing wire is so arranged that the seam closely approximates the structure of the body of the wire as to strength, flexibility and porosity. A great objection to scam structures heretofore in use has been that they would not permit the pulp disposed over the seam to drain with the same degree of uniformity as the pulp on the body of thewire', and also produced a ridge so that the paper would be distinctly marked at the seam by a line extending across it.

It is an object of the invention to provide a seam structure which will drain 1n conformity with the body of the wire, which will not mark the paper, and in which the tendency of the pulp to clog ,or pile up is obviated.

Another object is to facilitate the rolling down of the seam to'make it flat after sewing of the lacing wire.

A further object is to provide a seam which is not likely to bend and project above theplane of the warp, and which will furthermore not be subject to excessive wear or breakage through engagement with the suction boxes of the paper making machine.

To this end it is proposed to provide a scam in which the lacing wire is successively looped about the butted end weft wires of the cloth in the same relation, that is, first over and under the weft wire'at one end and then over and under the weft wire at the other end, the successive connecting portions being disposed in crisscross relation with each other, and thus approximating in their arrangement the relation of the warp W1I'8S between the weft wires.

With the above and other objects in View an embodiment of the invention is shown in the accompanying drawings, and this embodiment will be hereafter more fully described with reference thereto, and the in vention will be finally pointed out in the claim.

size is about of an inch in'width. The

wire cloth consists of warp wires 10 and weft wires 11 of brass, bronze, or other suitable material for the purpose.

The end weft wires 12 at each end of the cloth, which are butted, and about which the lacing wire is engaged, are preferablysecured tothe warp wire ends by a metallic union, indicated at 13, so that these wires which the belt is subjected in use in the paper making machine, and which will furthermore be free of the whipping wires usually employed to secure the end weft wires. While the end weft wires may be secured in any desirable manner, I preferably. employ "the method disclosed in my Patent Number 1,747,272, granted Feb. 18, 1930, which consists in providing a solder-covered wire at each end of the cloth to which heat is applied to produce solder joints at the points of intersectiomwith the warp wire ends, this method resulting in a strong, uniform union along the entire width of the belt, the interstices between the wires being at the same time maintained free of lumpy spots.

The seam is completed by hand-sewing the lacing wire 14 about the two butted ends of the length of wire cloth. According to the present embodiment of the invention the lacing wire is carried over and under the end weft wire at one side, and then over and underthe end weft wire at the other side, being thus successively carried about the two end weft strandsin the same over and under relation for the full width of the belt.

will resist the severe strains and stresses to j The connecting portions are thus diagonally disposed in crisscross relation below the planes of the upper and lower surfaces of the warp wires. The lacing wire thus approximates in appearance and structure the crisscross arrangement of the warp wires between the weft wires in the body of the wire cloth.

While I have shown the lacing wire sewed in every other mesh hole, it will be understood that it may be sewed in every. mesh hole, or any other combination.

'The lacing wire is free of any portions that may project or bend above the plane of the cloth,'so 'that it is protected against the danger of being cut, off by the suction boxes over which the belt moves. The porosity, flexibility, and structure of the seam, closely approximating the body of the wire, greatly reduces the chance of showing a seam mark in the paper. The seam structure may be iolled fiat, after sewing of the lacing wire, with greater facility than heretofore, and in putting the wire in the paper machine there is less danger of bending the seam and making the lacing wire project above the plane of the warp, as has been the case with many seam structures previously known.

I have illustrated and described a preferred and satisfactory embodiment of my invention, but it will be obvious that changes may be made therein, within the spirit and scope thereof, as defined in the appended claim.

Having thus described my invention what I claim and desire to secure by Letters Patent is In a wire cloth belt, a length of woven wire v cloth comprising warp and weft wires, and including a weft strand at each end adapted to have a lacing wire looped about it, certain of the warp wire ends passing over said end weft wires and certain other of the warp wire ends passing under said end weft wires, and a lacing wire passing over one of said end weft wires at the opposite side and at points directly opposed to the points at which said warp wires pass under said end weft wire and being carried to the under side of said end weft wire and extending therefrom to the other end weft wire and passing thereover at'the opposite side and thence backwardl thereunder at points directly opposed to the points at which said warp wireends pass over said end weft wire, said lacing wire being at no point engaged with the upper surface of said warp wires which passfover said end weft wires.

Signed at Belleville, county of Essex, and State of New Jersey, this 39 day of August,

NELSON w. WEBB. 

